Histograms
Histograms show plots of pixel count (y-axis) vs tonal grayscale from B to W (x-axis).
For an 8-bit image (JPEG), each pixel may record a tone ranging across (2^8) or 256 possibilities from B to W. So the x-axis of the histogram includes 256 bins, and the y-axis records the total number of pixels in the image for each of those 256 bins.
For an 8-bit image (JPEG), each pixel may record a tone ranging across (2^8) or 256 possibilities from B to W. So the x-axis of the histogram includes 256 bins, and the y-axis records the total number of pixels in the image for each of those 256 bins.
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